Streams Replication: source DB Oracle 11gR2, Target DB Oracle 11gR1

We are replicating a few tables from Oracle Database 11gR2 to Oracle
11gR1 using Streams Replication (Downstream Capture). The archived log
files from the source DB (11gR2) are shipped to a shared drive. We
then register the archived log files at the target database (11gR1)
using ALTER DATABASE REGISTER ... command.